Betta macrostoma Regan, 1910 BE

Betta macrostoma Regan, 1910: Eden, 1982: 165 (Brunei); Eden, 1984: 187 (Belait district: Mendaram river near Labi, Rampayoh river); Linke, 1991: 39 (Belait district: upper reaches of Sungai Mendaram); Kottelat & Lim, 1995: 248 (Brunei); Parenti & Meisner, 2003: 47 (lower Belait); Tan & Ng, 2005: 71-72 (Belait district: Sungai Mendaram, Sungai Rampayoh, Sungai Jaung).